Office of Operations
photos of traffic merging onto congested highway, congestion in snowstorm, variable message sign, cargo, variable speed limit sign in a work zone, and a freeway at night
21st Century Operations Using 21st Century Technologies

Long Descriptions for Benefits of Access Management Brochure

Long Description for Signal Spacing - Table 1: Table showing signals per mile and related increase in travel time.

  • Signals per mile is 2, no increase in travel time
  • Signals per mile is 3, 9% increase in travel time
  • Signals per mile is 4, 16% increase in travel time
  • Signals per mile is 5, 23% increase in travel time
  • Signals per mile is 6, 29% increase in travel time
  • Signals per mile is 7, 34% increase in travel time
  • Signals per mile is 8, 39% increase in travel time

Long Description for Signal Spacing - Table 2: Table showing signals per mile and related crashes per million VMT.

  • Signals per mile is under 2, 3.53 crashes per million VMT
  • Signals per mile is 2 to 4, 6.89 crashes per million VMT
  • Signals per mile is 4 to 6, 7.49 crashes per million VMT
  • Signals per mile is 6 and above, 9.11 crashes per million VMT

Long Description for Driveway Spacing - Graph showing driveways per mile in urban and rural areas and related crashes per million VMT.

  • Under 20 driveways per mile in urban areas, 4 crashes per million VMT
  • 20 to 40 driveways per mile in urban areas, approximately 6.5 crashes per million VMT
  • 40 to 60 driveways per mile in urban areas, approximately 7.5 crashes per million VMT
  • Over 60 driveways per mile in urban areas, approximately 8.5 crashes per million VMT
  • Under 15 driveways per mile in rural areas, approximately 1.8 crashes per million VMT
  • 15 to 30 driveways per mile in rural areas, 2 crashes per million VMT
  • Over 30 driveways per mile in rural areas, 3 crashes per million VMT

 

Long Description for Right Turns: Table showing right-turning vehicles per hour and related through vehicles impacted

  • Under 30 right-turning vehicles per hour, 2.4 percent through vehicles impacted
  • 31 to 61 right-turning vehicles per hour, 7.5 percent through vehicles impacted
  • 61 to 90 right-turning vehicles per hour, 12.2 percent through vehicles impacted
  • 90 or more right-turning vehicles per hour, 21.8 percent through vehicles impacted

Long Description for Medians: Graph showing median type in urban and rural areas and related crashes per million VMT

  • Approximately 8.9 crashes per million VMT at undivided medians in urban areas
  • 3 crashes per million VMT at undivided medians in rural areas
  • 7 crashes per million VMT at two-way left turn lanes in urban areas
  • 2 crashes per million VMT at two-way left turn lanes in rural areas
  • Approximately 5.5 crashes per million VMT at nontraversible medians in urban areas
  • Approximately 1 crashes per million VMT at nontraversible medians in rural areas

Long Description for Business Concerns: Table showing locations with medians installed and the percentage of business owners reporting no decline in business

  • In Texas, 93 percent of business owners reported that there was no decline in business
  • In another region in Texas, 78 to 84 percent of business owners reported that there was no decline in business
  • In Iowa, 67 to 91 percent of business owners reported that there was no decline in business

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